Expired European patentEurope
Method for determining the propagation time between a remote terminal station and a central terminal station, in a bidirectional point-to-multipoint transmission system
EP 0555596 B1 · Applicant: ALCATEL CIT
Overview
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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 31, 1992 and granted April 9, 1997. A European patent lasts at most 20 years from filing, so its term ended January 31, 2012.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by July 31, 2017.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJanuary 31, 1992
PublishedAugust 18, 1993
GrantedApril 9, 1997
Term endedJanuary 31, 2012
Application numberEP 92400266
Classification (CPC)H04B7/24 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.